Which of the following are examples of work being done on an object? Choose the 4 that apply.
a
Carrying a box up a flight of stairs
b
Holding a 25 kg barbell over your head
c
Lifting a bag of groceries
d
Wind blowing against a tree
e
Pushing a grocery cart through the store
f
Lifting a rock off the ground
g
Carrying a bag of groceries to the car
h
Pushing on a car that will not move
a, c, f, h
The four examples of work being done on an object are:
1. Carrying a box up a flight of stairs
2. Holding a 25 kg barbell over your head
3. Lifting a bag of groceries
4. Lifting a rock off the ground